Cyanine Dyes

Ficken, G. E.

doi:10.1016/b978-0-12-717004-6.50012-6

Cited by 36 publications

(10 citation statements)

References 228 publications

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“…Nevertheless, cyanines have held a long history regarding their practical use, which started to use such materials as sensitizers in silver halide photography [32][33][34] until the point when electronic media took their place in imaging sciences to save pictures. Many fundamental knowledge was grown up in this period as shown for example by several reviews [35][36][37][38][39][40]. Particularly, the use of model systems and the knowledge obtained by exploration systems in silver halide photography [32][33][34][41][42][43][44][45] also helped to understand the function and formation H and J-aggregates [46][47][48][49] being aligned parallel or in series, respectively.…”

Section: Introductionmentioning

confidence: 99%

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0

Strehmel¹,

Schmitz²,

Kütahya³

et al. 2020

Beilstein J. Org. Chem.

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Cyanines derived from heptamethines were mainly discussed regarding their functionalization to broaden the solubility in different surroundings exhibiting either hydrophilic or hydrophobic properties and to tailor made the ΔG et photopysical properties with respect to absorption and fluorescence. Electrochemical properties were additionally considered for some selected examples. The cyanines chosen comprised as end groups either indolenine, benzo[e]- or benzo[cd]indolium pattern, which facilitated to shift the absorption between 750–1000 nm. This enabled their use in applications with light sources emitting in the near-infrared (NIR) region selected from high power LEDs or lasers with line-shaped focus. The absorbers considered were discussed regarding their function as sensitizer for applications related to Chemistry 4.0 standards. These were mainly photopolymer coatings, which can be found for applications in the graphic industry or to protect selected substrates. The huge release of heat on demand upon turning ON or OFF the NIR light source enables them for photothermal treatment in processes requesting heat to initiate either chemical (activated reactions) or physical (melting, evaporation) events.

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Section: Introductionmentioning

confidence: 99%

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0

Strehmel¹,

Schmitz²,

Kütahya³

et al. 2020

Beilstein J. Org. Chem.

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“…Three distinct classes include cyanine, styryl, and merocyanine dyes, for which representative structures are shown in Fig. 1A (1)(2)(3)(4)(5)(6)(7)(8). Key distinctions between the dyes center on the nature of the p-system and supporting hetero-organic framework, including the number of carbon atoms and the charge therein.…”

Section: Introductionmentioning

confidence: 99%

“…Key distinctions between the dyes center on the nature of the π ‐system and supporting hetero‐organic framework, including the number of carbon atoms and the charge therein. A cyanine dye consists of two heterocyclic nuclei joined by a conjugated polyene chain containing an odd number of carbon atoms . One nitrogen bears a formal cationic charge whereas the other nitrogen is neutral, yet otherwise the two halves typically are identical.…”

Section: Introductionmentioning

confidence: 99%

Integration of Cyanine, Merocyanine and Styryl Dye Motifs with Synthetic Bacteriochlorins

Yang

Zhang

Krayer

et al. 2015

Photochem & Photobiology

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Understanding the effects of substituents on spectral properties is essential for the rational design of tailored bacteriochlorins for light-harvesting and other applications. Toward this goal, three new bacteriochlorins containing previously unexplored conjugating substituents have been prepared and characterized. The conjugating substituents include two positively charged species, 2-(N-ethyl 2-quinolinium)vinyl- (B-1) and 2-(N-ethyl 4-pyridinium)vinyl- (B-2), and a neutral group, acroleinyl- (B-3); the charged species resemble cyanine (or styryl) dye motifs whereas the neutral unit resembles a merocyanine dye motif. The three bacteriochlorins are examined by static and time-resolved absorption and emission spectroscopy and density functional theoretical calculations. B-1 and B-2 have Qy absorption bathochromically shifted well into the NIR region (822 and 852 nm), farther than B-3 (793 nm) and other 3,13-disubstituted bacteriochlorins studied previously. B-1 and B-2 have broad Qy absorption and fluorescence features with large peak separation (Stokes shift), low fluorescence yields, and shortened S1 (Qy ) excited-state lifetimes (~700 ps and ~100 ps). More typical spectra and S1 lifetime (~2.3 ns) are found for B-3. The combined photophysical and molecular-orbital characteristics suggest the altered spectra and enhanced nonradiative S1 decay of B-1 and B-2 derive from excited-state configurations in which electron density is shifted between the macrocycle and the substituents.

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“…The cyanine dye (PTC) was synthesized according to the methods suggested by Hamer [24] and Ficken [25] (illustrated in Scheme S1 in the Supporting Information), and the purity was proved by NMR spectroscopy and mass spectrometry (MS). Human serum albumin (HSA, Catalog No.…”

Section: Methodsmentioning

confidence: 99%

Chiral Transformation of Achiral J‐aggregates of a Cyanine Dye Templated by Human Serum Albumin

et al. 2007

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Cyanine Dyes

Cited by 36 publications

References 228 publications

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0

Integration of Cyanine, Merocyanine and Styryl Dye Motifs with Synthetic Bacteriochlorins

Chiral Transformation of Achiral J‐aggregates of a Cyanine Dye Templated by Human Serum Albumin

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